diff options
Diffstat (limited to 'linuxthreads/internals.h')
| -rw-r--r-- | linuxthreads/internals.h | 550 |
1 files changed, 0 insertions, 550 deletions
diff --git a/linuxthreads/internals.h b/linuxthreads/internals.h deleted file mode 100644 index 605021766c..0000000000 --- a/linuxthreads/internals.h +++ /dev/null @@ -1,550 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -#ifndef _INTERNALS_H -#define _INTERNALS_H 1 - -/* Internal data structures */ - -/* Includes */ - -#include <limits.h> -#include <signal.h> -#include <stdbool.h> -#include <unistd.h> -#include <stackinfo.h> -#include <sigcontextinfo.h> - -#include <tls.h> -#include "descr.h" - -#include "semaphore.h" -#include <pthread-functions.h> - -#ifndef THREAD_GETMEM -# define THREAD_GETMEM(descr, member) descr->member -#endif -#ifndef THREAD_GETMEM_NC -# define THREAD_GETMEM_NC(descr, member) descr->member -#endif -#ifndef THREAD_SETMEM -# define THREAD_SETMEM(descr, member, value) descr->member = (value) -#endif -#ifndef THREAD_SETMEM_NC -# define THREAD_SETMEM_NC(descr, member, value) descr->member = (value) -#endif - -#if !defined NOT_IN_libc && defined FLOATING_STACKS -# define LIBC_THREAD_GETMEM(descr, member) THREAD_GETMEM (descr, member) -# define LIBC_THREAD_SETMEM(descr, member, value) \ - THREAD_SETMEM (descr, member, value) -#else -# define LIBC_THREAD_GETMEM(descr, member) descr->member -# define LIBC_THREAD_SETMEM(descr, member, value) descr->member = (value) -#endif - -typedef void (*destr_function)(void *); - -struct pthread_key_struct { - int in_use; /* already allocated? */ - destr_function destr; /* destruction routine */ -}; - - -#define PTHREAD_START_ARGS_INITIALIZER(fct) \ - { (void *(*) (void *)) fct, NULL, {{0, }}, 0, { 0 } } - - -/* The type of thread handles. */ - -typedef struct pthread_handle_struct * pthread_handle; - -struct pthread_handle_struct { - struct _pthread_fastlock h_lock; /* Fast lock for sychronized access */ - pthread_descr h_descr; /* Thread descriptor or NULL if invalid */ - char * h_bottom; /* Lowest address in the stack thread */ -}; - -/* The type of messages sent to the thread manager thread */ - -struct pthread_request { - pthread_descr req_thread; /* Thread doing the request */ - enum { /* Request kind */ - REQ_CREATE, REQ_FREE, REQ_PROCESS_EXIT, REQ_MAIN_THREAD_EXIT, - REQ_POST, REQ_DEBUG, REQ_KICK, REQ_FOR_EACH_THREAD - } req_kind; - union { /* Arguments for request */ - struct { /* For REQ_CREATE: */ - const pthread_attr_t * attr; /* thread attributes */ - void * (*fn)(void *); /* start function */ - void * arg; /* argument to start function */ - sigset_t mask; /* signal mask */ - } create; - struct { /* For REQ_FREE: */ - pthread_t thread_id; /* identifier of thread to free */ - } free; - struct { /* For REQ_PROCESS_EXIT: */ - int code; /* exit status */ - } exit; - void * post; /* For REQ_POST: the semaphore */ - struct { /* For REQ_FOR_EACH_THREAD: callback */ - void (*fn)(void *, pthread_descr); - void *arg; - } for_each; - } req_args; -}; - - - -typedef void (*arch_sighandler_t) (int, SIGCONTEXT); -union sighandler -{ - arch_sighandler_t old; - void (*rt) (int, struct siginfo *, struct ucontext *); -}; -extern union sighandler __sighandler[NSIG]; - - -/* Signals used for suspend/restart and for cancellation notification. */ - -extern int __pthread_sig_restart; -extern int __pthread_sig_cancel; - -/* Signal used for interfacing with gdb */ - -extern int __pthread_sig_debug; - -/* Global array of thread handles, used for validating a thread id - and retrieving the corresponding thread descriptor. Also used for - mapping the available stack segments. */ - -extern struct pthread_handle_struct __pthread_handles[PTHREAD_THREADS_MAX]; - -/* Descriptor of the main thread */ - -extern pthread_descr __pthread_main_thread; - -/* File descriptor for sending requests to the thread manager. - Initially -1, meaning that __pthread_initialize_manager must be called. */ - -extern int __pthread_manager_request; - -/* Other end of the pipe for sending requests to the thread manager. */ - -extern int __pthread_manager_reader; - -#ifdef FLOATING_STACKS -/* Maximum stack size. */ -extern size_t __pthread_max_stacksize; -#endif - -/* Pending request for a process-wide exit */ - -extern int __pthread_exit_requested, __pthread_exit_code; - -/* Set to 1 by gdb if we're debugging */ - -extern volatile int __pthread_threads_debug; - -/* Globally enabled events. */ -extern volatile td_thr_events_t __pthread_threads_events; - -/* Pointer to descriptor of thread with last event. */ -extern volatile pthread_descr __pthread_last_event; - -/* Flag which tells whether we are executing on SMP kernel. */ -extern int __pthread_smp_kernel; - -/* Return the handle corresponding to a thread id */ - -static inline pthread_handle thread_handle(pthread_t id) -{ - return &__pthread_handles[id % PTHREAD_THREADS_MAX]; -} - -/* Validate a thread handle. Must have acquired h->h_spinlock before. */ - -static inline int invalid_handle(pthread_handle h, pthread_t id) -{ - return h->h_descr == NULL || h->h_descr->p_tid != id || h->h_descr->p_terminated; -} - -static inline int nonexisting_handle(pthread_handle h, pthread_t id) -{ - return h->h_descr == NULL || h->h_descr->p_tid != id; -} - -/* Fill in defaults left unspecified by pt-machine.h. */ - -/* We round up a value with page size. */ -#ifndef page_roundup -#define page_roundup(v,p) ((((size_t) (v)) + (p) - 1) & ~((p) - 1)) -#endif - -/* The page size we can get from the system. This should likely not be - changed by the machine file but, you never know. */ -#ifndef PAGE_SIZE -#define PAGE_SIZE (sysconf (_SC_PAGE_SIZE)) -#endif - -/* The initial size of the thread stack. Must be a multiple of PAGE_SIZE. */ -#ifndef INITIAL_STACK_SIZE -#define INITIAL_STACK_SIZE (4 * PAGE_SIZE) -#endif - -/* Size of the thread manager stack. The "- 32" avoids wasting space - with some malloc() implementations. */ -#ifndef THREAD_MANAGER_STACK_SIZE -#define THREAD_MANAGER_STACK_SIZE (2 * PAGE_SIZE - 32) -#endif - -/* The base of the "array" of thread stacks. The array will grow down from - here. Defaults to the calculated bottom of the initial application - stack. */ -#ifndef THREAD_STACK_START_ADDRESS -#define THREAD_STACK_START_ADDRESS __pthread_initial_thread_bos -#endif - -/* If MEMORY_BARRIER isn't defined in pt-machine.h, assume the - architecture doesn't need a memory barrier instruction (e.g. Intel - x86). Still we need the compiler to respect the barrier and emit - all outstanding operations which modify memory. Some architectures - distinguish between full, read and write barriers. */ - -#ifndef MEMORY_BARRIER -#define MEMORY_BARRIER() asm ("" : : : "memory") -#endif -#ifndef READ_MEMORY_BARRIER -#define READ_MEMORY_BARRIER() MEMORY_BARRIER() -#endif -#ifndef WRITE_MEMORY_BARRIER -#define WRITE_MEMORY_BARRIER() MEMORY_BARRIER() -#endif - -/* Max number of times we must spin on a spinlock calling sched_yield(). - After MAX_SPIN_COUNT iterations, we put the calling thread to sleep. */ - -#ifndef MAX_SPIN_COUNT -#define MAX_SPIN_COUNT 50 -#endif - -/* Max number of times the spinlock in the adaptive mutex implementation - spins actively on SMP systems. */ - -#ifndef MAX_ADAPTIVE_SPIN_COUNT -#define MAX_ADAPTIVE_SPIN_COUNT 100 -#endif - -/* Duration of sleep (in nanoseconds) when we can't acquire a spinlock - after MAX_SPIN_COUNT iterations of sched_yield(). - With the 2.0 and 2.1 kernels, this MUST BE > 2ms. - (Otherwise the kernel does busy-waiting for realtime threads, - giving other threads no chance to run.) */ - -#ifndef SPIN_SLEEP_DURATION -#define SPIN_SLEEP_DURATION 2000001 -#endif - -/* Defined and used in libc.so. */ -extern int __libc_multiple_threads attribute_hidden; -extern int __librt_multiple_threads; - -/* Debugging */ - -#ifdef DEBUG -#include <assert.h> -#define ASSERT assert -#define MSG __pthread_message -#else -#define ASSERT(x) -#define MSG(msg,arg...) -#endif - -/* Internal global functions */ - -extern void __pthread_do_exit (void *retval, char *currentframe) - __attribute__ ((__noreturn__)); -extern void __pthread_destroy_specifics (void); -extern void __pthread_perform_cleanup (char *currentframe); -extern void __pthread_init_max_stacksize (void); -extern int __pthread_initialize_manager (void); -extern void __pthread_message (const char * fmt, ...); -extern int __pthread_manager (void *reqfd); -extern int __pthread_manager_event (void *reqfd); -extern void __pthread_manager_sighandler (int sig); -extern void __pthread_reset_main_thread (void); -extern void __pthread_once_fork_prepare (void); -extern void __pthread_once_fork_parent (void); -extern void __pthread_once_fork_child (void); -extern void __flockfilelist (void); -extern void __funlockfilelist (void); -extern void __fresetlockfiles (void); -extern void __pthread_manager_adjust_prio (int thread_prio); -extern void __pthread_initialize_minimal (void); - -extern int __pthread_attr_setguardsize (pthread_attr_t *__attr, - size_t __guardsize); -extern int __pthread_attr_getguardsize (const pthread_attr_t *__attr, - size_t *__guardsize); -extern int __pthread_attr_setstackaddr (pthread_attr_t *__attr, - void *__stackaddr); -extern int __pthread_attr_getstackaddr (const pthread_attr_t *__attr, - void **__stackaddr); -extern int __pthread_attr_setstacksize (pthread_attr_t *__attr, - size_t __stacksize); -extern int __pthread_attr_getstacksize (const pthread_attr_t *__attr, - size_t *__stacksize); -extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr, - size_t __stacksize); -extern int __pthread_attr_getstack (const pthread_attr_t *__attr, void **__stackaddr, - size_t *__stacksize); -extern int __pthread_attr_destroy (pthread_attr_t *attr); -extern int __pthread_attr_setdetachstate (pthread_attr_t *attr, - int detachstate); -extern int __pthread_attr_getdetachstate (const pthread_attr_t *attr, - int *detachstate); -extern int __pthread_attr_setschedparam (pthread_attr_t *attr, - const struct sched_param *param); -extern int __pthread_attr_getschedparam (const pthread_attr_t *attr, - struct sched_param *param); -extern int __pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy); -extern int __pthread_attr_getschedpolicy (const pthread_attr_t *attr, - int *policy); -extern int __pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit); -extern int __pthread_attr_getinheritsched (const pthread_attr_t *attr, - int *inherit); -extern int __pthread_attr_setscope (pthread_attr_t *attr, int scope); -extern int __pthread_attr_getscope (const pthread_attr_t *attr, int *scope); - -extern int __pthread_getconcurrency (void); -extern int __pthread_setconcurrency (int __level); -extern int __pthread_mutex_timedlock (pthread_mutex_t *__mutex, - const struct timespec *__abstime); -extern int __pthread_mutexattr_getpshared (const pthread_mutexattr_t *__attr, - int *__pshared); -extern int __pthread_mutexattr_setpshared (pthread_mutexattr_t *__attr, - int __pshared); -extern int __pthread_mutexattr_gettype (const pthread_mutexattr_t *__attr, - int *__kind); -extern void __pthread_kill_other_threads_np (void); -extern int __pthread_mutex_init (pthread_mutex_t *__mutex, - __const pthread_mutexattr_t *__mutex_attr); -extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex); -extern int __pthread_mutex_lock (pthread_mutex_t *__mutex); -extern int __pthread_mutex_trylock (pthread_mutex_t *__mutex); -extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex); -#if defined NOT_IN_libc && defined IS_IN_libpthread -hidden_proto (__pthread_mutex_init) -hidden_proto (__pthread_mutex_destroy) -hidden_proto (__pthread_mutex_lock) -hidden_proto (__pthread_mutex_trylock) -hidden_proto (__pthread_mutex_unlock) -#endif -extern int __pthread_cond_init (pthread_cond_t *cond, - const pthread_condattr_t *cond_attr); -extern int __pthread_cond_destroy (pthread_cond_t *cond); -extern int __pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex); -extern int __pthread_cond_timedwait (pthread_cond_t *cond, - pthread_mutex_t *mutex, - const struct timespec *abstime); -extern int __pthread_cond_signal (pthread_cond_t *cond); -extern int __pthread_cond_broadcast (pthread_cond_t *cond); -extern int __pthread_condattr_init (pthread_condattr_t *attr); -extern int __pthread_condattr_destroy (pthread_condattr_t *attr); -extern pthread_t __pthread_self (void); -extern pthread_descr __pthread_thread_self (void); -extern pthread_descr __pthread_self_stack (void) attribute_hidden; -extern int __pthread_equal (pthread_t thread1, pthread_t thread2); -extern void __pthread_exit (void *retval); -extern int __pthread_getschedparam (pthread_t thread, int *policy, - struct sched_param *param); -extern int __pthread_setschedparam (pthread_t thread, int policy, - const struct sched_param *param); -extern int __pthread_setcancelstate (int state, int * oldstate); -extern int __pthread_setcanceltype (int type, int * oldtype); - -extern void __pthread_restart_old(pthread_descr th); -extern void __pthread_suspend_old(pthread_descr self); -extern int __pthread_timedsuspend_old(pthread_descr self, const struct timespec *abs); - -extern void __pthread_restart_new(pthread_descr th); -extern void __pthread_suspend_new(pthread_descr self); -extern int __pthread_timedsuspend_new(pthread_descr self, const struct timespec *abs); - -extern void __pthread_wait_for_restart_signal(pthread_descr self); - -extern void __pthread_sigsuspend (const sigset_t *mask) attribute_hidden; - -extern int __pthread_yield (void); - -extern int __pthread_rwlock_timedrdlock (pthread_rwlock_t *__restrict __rwlock, - __const struct timespec *__restrict - __abstime); -extern int __pthread_rwlock_timedwrlock (pthread_rwlock_t *__restrict __rwlock, - __const struct timespec *__restrict - __abstime); -extern int __pthread_rwlockattr_destroy (pthread_rwlockattr_t *__attr); - -extern int __pthread_barrierattr_getpshared (__const pthread_barrierattr_t * - __restrict __attr, - int *__restrict __pshared); - -extern int __pthread_spin_lock (pthread_spinlock_t *__lock); -extern int __pthread_spin_trylock (pthread_spinlock_t *__lock); -extern int __pthread_spin_unlock (pthread_spinlock_t *__lock); -extern int __pthread_spin_init (pthread_spinlock_t *__lock, int __pshared); -extern int __pthread_spin_destroy (pthread_spinlock_t *__lock); - -/* Global pointers to old or new suspend functions */ - -extern void (*__pthread_restart)(pthread_descr); -extern void (*__pthread_suspend)(pthread_descr); -extern int (*__pthread_timedsuspend)(pthread_descr, const struct timespec *); - -/* Prototypes for the function without cancelation support when the - normal version has it. */ -extern int __libc_close (int fd); -extern int __libc_nanosleep (const struct timespec *requested_time, - struct timespec *remaining); -/* Prototypes for some of the new semaphore functions. */ -extern int __new_sem_post (sem_t * sem); -extern int __new_sem_init (sem_t *__sem, int __pshared, unsigned int __value); -extern int __new_sem_wait (sem_t *__sem); -extern int __new_sem_trywait (sem_t *__sem); -extern int __new_sem_getvalue (sem_t *__restrict __sem, int *__restrict __sval); -extern int __new_sem_destroy (sem_t *__sem); - -/* Prototypes for compatibility functions. */ -extern int __pthread_attr_init_2_1 (pthread_attr_t *__attr); -extern int __pthread_attr_init_2_0 (pthread_attr_t *__attr); -extern int __pthread_create_2_1 (pthread_t *__restrict __threadp, - const pthread_attr_t *__attr, - void *(*__start_routine) (void *), - void *__restrict __arg); -extern int __pthread_create_2_0 (pthread_t *__restrict thread, - const pthread_attr_t *__attr, - void *(*__start_routine) (void *), - void *__restrict arg); - -/* The functions called the signal events. */ -extern void __linuxthreads_create_event (void); -extern void __linuxthreads_death_event (void); -extern void __linuxthreads_reap_event (void); - -/* This function is called to initialize the pthread library. */ -extern void __pthread_initialize (void); - -/* TSD. */ -extern int __pthread_internal_tsd_set (int key, const void * pointer); -extern void * __pthread_internal_tsd_get (int key); -extern void ** __attribute__ ((__const__)) - __pthread_internal_tsd_address (int key); - -/* Sighandler wrappers. */ -extern void __pthread_sighandler(int signo, SIGCONTEXT ctx); -extern void __pthread_sighandler_rt(int signo, struct siginfo *si, - struct ucontext *uc); -extern void __pthread_null_sighandler(int sig); -extern int __pthread_sigaction (int sig, const struct sigaction *act, - struct sigaction *oact); -extern int __pthread_sigwait (const sigset_t *set, int *sig); -extern int __pthread_raise (int sig); - -/* Cancellation. */ -extern int __pthread_enable_asynccancel (void) attribute_hidden; -extern void __pthread_disable_asynccancel (int oldtype) - internal_function attribute_hidden; - -/* The two functions are in libc.so and not exported. */ -extern int __libc_enable_asynccancel (void) attribute_hidden; -extern void __libc_disable_asynccancel (int oldtype) - internal_function attribute_hidden; - -/* The two functions are in libc.so and are exported. */ -extern int __librt_enable_asynccancel (void); -extern void __librt_disable_asynccancel (int oldtype) internal_function; - -extern void __pthread_cleanup_upto (__jmp_buf target, - char *targetframe) attribute_hidden; -extern pid_t __pthread_fork (struct fork_block *b) attribute_hidden; - -#if !defined NOT_IN_libc -# define LIBC_CANCEL_ASYNC() \ - __libc_enable_asynccancel () -# define LIBC_CANCEL_RESET(oldtype) \ - __libc_disable_asynccancel (oldtype) -# define LIBC_CANCEL_HANDLED() \ - __asm (".globl " __SYMBOL_PREFIX "__libc_enable_asynccancel"); \ - __asm (".globl " __SYMBOL_PREFIX "__libc_disable_asynccancel") -#elif defined IS_IN_libpthread -# define LIBC_CANCEL_ASYNC() \ - __pthread_enable_asynccancel () -# define LIBC_CANCEL_RESET(oldtype) \ - __pthread_disable_asynccancel (oldtype) -# define LIBC_CANCEL_HANDLED() \ - __asm (".globl " __SYMBOL_PREFIX "__pthread_enable_asynccancel"); \ - __asm (".globl " __SYMBOL_PREFIX "__pthread_disable_asynccancel") -#elif defined IS_IN_librt -# define LIBC_CANCEL_ASYNC() \ - __librt_enable_asynccancel () -# define LIBC_CANCEL_RESET(oldtype) \ - __librt_disable_asynccancel (oldtype) -# define LIBC_CANCEL_HANDLED() \ - __asm (".globl " __SYMBOL_PREFIX "__librt_enable_asynccancel"); \ - __asm (".globl " __SYMBOL_PREFIX "__librt_disable_asynccancel") -#else -# define LIBC_CANCEL_ASYNC() 0 /* Just a dummy value. */ -# define LIBC_CANCEL_RESET(val) ((void)(val)) /* Nothing, but evaluate it. */ -# define LIBC_CANCEL_HANDLED() /* Nothing. */ -#endif - -extern int * __libc_pthread_init (const struct pthread_functions *functions); - -#if !defined NOT_IN_libc && !defined FLOATING_STACKS -# ifdef SHARED -# define thread_self() \ - (*__libc_pthread_functions.ptr_pthread_thread_self) () -# else -weak_extern (__pthread_thread_self) -# define thread_self() __pthread_thread_self () -# endif -#endif - -#ifndef USE_TLS -# define __manager_thread (&__pthread_manager_thread) -#else -# define __manager_thread __pthread_manager_threadp -#endif - -extern inline __attribute__((always_inline)) pthread_descr -check_thread_self (void) -{ - pthread_descr self = thread_self (); -#if defined THREAD_SELF && defined INIT_THREAD_SELF - if (self == __manager_thread) - { - /* A new thread might get a cancel signal before it is fully - initialized, so that the thread register might still point to the - manager thread. Double check that this is really the manager - thread. */ - self = __pthread_self_stack(); - if (self != __manager_thread) - /* Oops, thread_self() isn't working yet.. */ - INIT_THREAD_SELF(self, self->p_nr); - } -#endif - return self; -} - -#endif /* internals.h */ |